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Thread: Weird RPM issue

  1. #11
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    Sorry to hear you are having issues with the new boat.
    I hope the prop works out for you.

    Not quite sure if I under stand why it would plane with two people a week ago and won't now, but I don't know squatt about PB's, except that you usually don't have to paddle them.
    RO and mjv80 like this.
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  2. #12
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    Blaster, a test ride might be in order. If it was running good a week ago and performance has changed that drastically, there is a missing variable somewhere like added gear/weight, change in fuel, trim or something...

    Small motors can be affected by even the smallest changes.
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    "Shit is not like it once was"- AggieGreg

  3. #13
    RO
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    Quote Originally Posted by Fish Finder View Post
    Blaster, a test ride might be in order. If it was running good a week ago and performance has changed that drastically, there is a missing variable somewhere like added gear/weight, change in fuel, trim or something...

    Small motors can be affected by even the smallest changes.
    ^^^^^^^^^^this

    For example, my 16 ft with 40 rude will get up on plane with 2 guys and gear, but add a third guy, and no plano. Weight is a big factor on smaller boats.

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  5. #14
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    I want to run it a few more times before I decide on what course of action to take.

    Will run it a few times this week and see if it acts any better.
    sometimes you think you have true love and then you catch the early flight home from San Diego

  6. #15
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    I would experiment with props blaster, and once Gary gets that accelerater pump in at the first of the year may help. Heck it was getting on plane with me 230lbs and you 150 two days ago running 23mph gps. Maybe 4 blade prop..?
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  7. #16
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    I remember even with us two it wasn't hitting max rpm with the prop that is on it before it would start to bow hop at 23mph. 23 is about the top speed you will see out of it, but it may need some better bow lift to get up in top of the water and plane out with a heavier load.

  8. #17
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    yea prop will be first experiment. So guess I'll figure out what the current size and pitch is and then work down from there?
    sometimes you think you have true love and then you catch the early flight home from San Diego

  9. #18
    RO
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    Quote Originally Posted by REdwards View Post
    I remember even with us two it wasn't hitting max rpm with the prop that is on it before it would start to bow hop at 23mph. 23 is about the top speed you will see out of it, but it may need some better bow lift to get up in top of the water and plane out with a heavier load.
    Does the motor have power tilt/trim? If it's bow hopping, then that suggests an over trimmed state. If not power trim, then consider advancing the tilt position pin forward toward the transom by one or two holes. This will help you get up on plane faster and with more load and also prevent porpoising.
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  10. #19
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    Quote Originally Posted by RO View Post
    If not power trim, then consider advancing the tilt position pin forward toward the transom by one or two holes. This will help you get up on plane faster and with more load and also prevent porpoising.
    Bingo.

    If it's a manual trim this is the first place I would look. With a loaded boat the motor should be full tucked to help get on plane
    "Shit is not like it once was"- AggieGreg

  11. #20
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    It's power trim and I tried it with the trim all the way down and every other combination imaginable.
    RO likes this.
    sometimes you think you have true love and then you catch the early flight home from San Diego

 

 
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